***Drake Intelligent Life Equation Slot Calculator Example***

This page is under development. Comments are welcome, but please load any comments in the comments section at the bottom of the page. Please include your wiki MONIKER  in your comment with the same courtesy that I will give you. Its very hard to reply intelligibly without some background of the correspondent. Thanks,[gold]
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**Introduction**
[gold] Here is an eTCL  script on 
to estimate drake equation. 
For the push buttons, the recommended
procedure is push testcase and fill frame,
change  entries , push solve, and
then push report. Report allows 
copy and paste from console.
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In planning any software, there is 
a need to develop testcases.  
 
**Testcase 1.**
%|quantity|number|units|%
&| star formation |  10.|rate per year  |&
&|stars with planets             | .5|stars|&
&| potential life                 | 2. ||&
&| actual life                    | 1. ||&
&| fraction develop civilization  |.01 |none|&
&| fraction technology            |.01|none|&
&| years available                |10000.|years|&
&|number of civilizations equal 10.* .5 * 2. * 1. * .01 * .01 * 10000.||&
&|answer: 10. ||civilizations|&
 
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***Screenshots Section***
****figure 1.****
[Drake Intelligent Life Equation Slot Calculator Example screen.jpg%|% width=600 height=400]
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***References:***
   * http://en.wikipedia.org/wiki/Drake_equation
   * http://www.astrodigital.org/astronomy/drake_equation.html
   * [expr]
   * [Importing expr functions]
   * [Category Package] 
   * [Importing expr functions, part 2]
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****Appendix TCL programs and scripts ****

**** Pretty Print Version*** 

======
        # Pretty print version from autoindent
        # and ased editor
        # program of drake equation
        # written on Windows XP on eTCL
        # working under TCL version 8.5.6 and eTCL 1.0.1
        # gold on TCL WIKI , 24aug2010
        frame .frame -relief flat -bg aquamarine4
        pack .frame -side top -fill y -anchor center
        set names {{} {star formation /yr:} {fraction w/ planets:} {poss life :} {actual life:} {civiliation develop:}
{detectable signs:} {length years:} { civilizations:} }
            foreach i {1 2 3 4 5 6 7 8} {
             label .frame.label$i -text [lindex $names $i] -anchor e
             entry .frame.entry$i -width 35 -textvariable side$i
             grid .frame.label$i .frame.entry$i -sticky ew -pady 2 -padx 1
            }
        proc about {} {
            set msg "Calculator for Drake Equation.
            from TCL WIKI,
            written on eTCL "
            tk_messageBox -title "About" -message $msg
            }
        proc intelligent5 { xx1   } {
            global side1 side2 side3
            global side4 side5 side6 side7 side8
            set side8  [ expr {  1*$side1*$side2*$side3*$side4*$side5*$side6*$side7 } ]
            return $side8
        }
        proc calculate {     } {
            global answer2   
            global side1 side2 side3 side4 side5 side6 side7 side8
            set answer2  [ intelligent5  $side8     ]
            set side8 $answer2
        }
        proc fillup {aa bb cc dd ee ff gg hh} {
            .frame.entry1 insert 0 "$aa"
            .frame.entry2 insert 0 "$bb"
            .frame.entry3 insert 0 "$cc"
            .frame.entry4 insert 0 "$dd"
            .frame.entry5 insert 0 "$ee"
            .frame.entry6 insert 0 "$ff "
            .frame.entry7 insert 0 "$gg "
            .frame.entry8 insert 0 "$hh "
        }
        proc clearx {} {
            foreach i {1 2 3 4 5 6 7 8} {
                .frame.entry$i delete 0 end
            }
        }
        proc reportx {} {
            global side1 side2 side3 side4 side5 side6 side7 side8
            console show;
            puts "
            puts " $side1  star formation /yr:  "
            puts " $side2  fraction w/ planets:  "
            puts " $side3  poss life :  "
            puts " $side4  actual life:  "
            puts " $side5  civiliation develop:  "
            puts " $side6  detectable signs:  "
            puts " $side7  length years:  "
            puts " $side1  civilizations:  "
            puts " $side2    "
            puts " $side3    "
            puts " $side4    "
            puts " $side5    "
            puts " $side6    "
            puts " $side7    "
            puts " $side8    "
            puts "answer   $side8 "
        }
        frame .buttons -bg aquamarine4
        ::ttk::button .calculator -text "Solve" -command { calculate   }
        ::ttk::button .test2 -text "Testcase1" -command {clearx;fillup 10. .5 2. 1.  .01 .01 10000. 10.}
        ::ttk::button .test3 -text "Testcase2" -command {clearx;fillup 10. .5 2. 1.  .01 .01 10000. 10. }
        ::ttk::button .test4 -text "Testcase3" -command {clearx;fillup 10. .5 2. 1.  .01 .01 10000. 10.  }
        ::ttk::button .clearallx -text clear -command {clearx  }
        ::ttk::button .about -text about -command about
        ::ttk::button .cons -text report -command { reportx }
        ::ttk::button .exit -text exit -command {exit}
        pack .calculator  -in .buttons -side top -padx 10 -pady 5
        pack  .clearallx .cons .about .exit .test4 .test3  .test2   -side bottom -in .buttons
        grid .frame .buttons -sticky ns -pady {0 10}
        . configure -background aquamarine4 -highlightcolor brown -relief raised -border 30
        wm title . "Drake Equation Calculator "
======  
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**Comments Section**
Please place any comments here, Thanks.
What is your purpose in binding the motion event on your main window to
execute the wm title command.  I.e., this line:
======
  bind . <Motion> {wm title . "Drake Equation Calculator "}
======
The result of that binding is that every time you move the mouse, the "wm   
title" subcommand is called repeatedly.  To set the window title, you just  
need to call "wm title . title" once, not on every event update upon mouse  
pointer motion.

Also, why do you define the procs ''pi'', ''interlinear'', ''pol'', ''errorx'', and ''height5'' when you do not appear to use them anywhere in the code presented?  In examples, having extra bits defined that are not used adds noise that a reader has to expend effort upon only to later learn that he/she could have ignored that part.  Keeping the example focused upon only that which is needed for just the example, and nothing more, makes for a more informative, and educational, example.
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[gold] changes: pulled procs pi,interlinear,pol,errorx,height5. and changed to wm . "title".
Former idea was that user could use interpolate routine in the punched console. Conjecture below was that in a namespace version, subroutines would be available, but not all called from the namespace.
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In that case, you might consider placing them into a namespace (i.e. ::gold::) and placing that common code on your main "gold" page.  Then each other example page can refer to that one common location for the common items.  Of course you would want to modify the examples to both load the ::gold definitions file from the [gold] page, and to make use of the procs therein instead of defining each individually.
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[gold] This page is copyrighted under the TCL/TK license terms, [http://tcl.tk/software/tcltk/license.html%|%this license]. 


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